138555672 has 32 divisors (see below), whose sum is σ = 346778880. Its totient is φ = 46133280.

The previous prime is 138555667. The next prime is 138555689. The reversal of 138555672 is 276555831.

138555672 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22797 + ... + 28227.

It is an arithmetic number, because the mean of its divisors is an integer number (10836840).

Almost surely, 2^138555672 is an apocalyptic number.

138555672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138555672 is an abundant number, since it is smaller than the sum of its proper divisors (208223208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138555672 is a wasteful number, since it uses less digits than its factorization.

138555672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6503 (or 6499 counting only the distinct ones).

The product of its digits is 252000, while the sum is 42.

The square root of 138555672 is about 11770.9673349305. The cubic root of 138555672 is about 517.4575997374.

The spelling of 138555672 in words is "one hundred thirty-eight million, five hundred fifty-five thousand, six hundred seventy-two".